The spelling of the word "most backbreaker" can be explained using the International Phonetic Alphabet (IPA). The first syllable "most" is spelled /məʊst/ with the long 'o' sound represented as /əʊ/ and a schwa sound /ə/. The second syllable "backbreaker" is spelled /bæk.breɪk.ər/ with the letter 'a' pronounced as /æ/ and the diphthong 'ai' represented by /eɪ/. Together, the word conveys the idea of something being extremely difficult or burdensome, as if breaking one's back.